Відео

There are no bathroom group values listed for public use in table 2.6.3.2.-A . You need to count them up separately and you get 8.2

I haven't studied the codes in the States. I know Canadian codes are different from US codes and they do not perfectly align. A real shame though, we should establish a harmonized code. At the end of the day, shit flows down hill with proper design and venting.

This varies from province to province and municipality to municipality. Will it wet vent from one side to the next, yes. Will the inspector pass it, maybe. This is a great reason to establish a good working relationship with your local inspector, they will answer your questions if you treat them with respect.

I do believe Ontario is still using their own gas code, not all provinces have aligned with gas or plumbing code practices. A shame really, we should have one. (Even the States have more than one code)

The vent connector with the smallest size must enter higher than the vent connector with the larger size. In the case of my example at 2:25, the diagram is screwed up and not to code according to clause 8.19.1 of the B149.1 code.

I have never studied the UPC, so I cannot give you an answer to that. I know Canadian code has differences from the UPC, I just do not know where.

No, thank you!

Unfortunately, American codes and Canadian codes do not align perfectly. All my tutorials are based on the Canadian code.

You are talking about a relief vent, does that mean your are referring to circuit venting? If so, I need more data to answer your question, but I suggest watching this video series first: ua-cam.com/video/SM30xRd6ND8/v-deo.html

I have multiple video series covering almost every aspect of DWV sizing and code related concepts.

These videos describe the small commercial method of waterline sizing. This is NOT the simplified method as you have stated. They are two totally different methods. Pipe D is a cold water pipe serving three lavs, one 3.5 kg clothes washer, one kitchen sink with one faucet and 2 - ½" hose bibbs. All fixtures are commercial. (The fine details were omitted because they were irrelevant to the video) Total hydraulic load = 18 FU @ 61m of developed length. Therefore the waterline must be 1" according to Table A-2.6.3.1.(2)-A If you want to get waterlines that are totally oversized, use your method. If you are in plumbing school, well good luck.

The concept of the main stack is only a trade term, it just refers to one stack that extends all the way through the roof no less than 3" in size. It is not directly defined in the code. So technically with your scenario, only one of the stacks would be the 'main stack', all the rest would be regular Soil or Waste (SOW) stacks. You could install 50 of them if you felt like it, but you might get slapped by someone as it's a waste of pipe.

Okay so what your saying is I could install three stacks that go threw the roof ?

@@denvercharlebois699 Sure can

Yeah eh?

I can't explain, other than this is a jurisdictional decision. Some inspectors will accept it, others will not. That whole 'Authority having jurisdiction' line is ringing in my ears right now.

@MathematicPlumber thanks for your time. Appreciate the response. Love your videos and Happy Easter my friend!

One more question would you plumb it in like this or would you prefer separate wyes with different vent configuration. I ask because I was taught that double wye you can't get the right fall on both side of that wye. I would appreciate your opinion

@@SamSckrapnick I prefer separate wyes. That way I can guarantee there is a clear path for the vent portion of the wet vent. I'm not as concerned about the grade from a double wye, because the pipe can be cheated into fittings with slope. But yes, the water will back travel up the pipe a bit through that wye. This all being said, I prefer not to use a double wye on the horizontal, but I will do it in a pinch if the local authority allows it.

@MathematicPlumber love the videos your a life saver and thanks again for the knowledge.

You can't size it without a load. If you want to leave a future outlet with an unknown load, it needs to be the same size as the main gas run into the building.

Yes. If you want to learn more about wet vents, I have an entire series on that too.

ua-cam.com/video/FpXNAEAm7cc/v-deo.html

2.4.9.4 Building drains and building sewers connected to the public sewer system downstream of the main cleanout (see Sentence 2.4.7.1.(6)) shall be not less than 4 inches in size. Keywords: 'downstream of the main clean out' and 'connected to the public sewer system' Therefore, the building drain upstream of the main CO can be 3". This also means that if I connect to a 'private sewage system' I can also be 3" for the building sewer or building drain. You would need to ensure all other code requirements are met too.

Oh okay. So anything past the clean out can be 3”? I’m in plumbing school in Ontario and was just told that 4” is minimum until it goes vertical on a stack then it goes to 3” minimum

Thanks for the tips

​@@denvercharlebois699What I gave you was a direct quote from the NPC. There may be an Ontario amendment that I am not aware of. (I am in Alberta) There of course is nuance in the code. If you had 3 or more water closets draining into the building drain, then you would need to size that pipe at 4" as soon as it travels nominally horizontal.

Please give me the code reference for that.

Definitely not a test question. Technically yes you can do that. However, I would size the common manifold based off of the total connected load and the longest run to ensure you don't get a choke point in your piping.

assume not on test, odd scenario, but if 3 independent runs 24" from meter, say one run is 200ft and the other 2 are 10ft, are all 3 runs calculated at 200 ft? or each sized on their own length ? actually this came up on a csa practice test (suprised me too) would it be treated like there was 3 meters? (because all 3 are 24"from meter)@@MathematicPlumber

Or a interesting question: if a very long run is branched 24” from meter, does IT become the longest run to calculate all piping in system?

@@davequesnel8740 No, that system will be a stand alone pipe size and length.

Each section is reduced by 10%, therefore the common vent to all 3 will be reduced by 20%. If you decide you want to just have a common connector manifold that is just one size, you would reduce the entire thing by 20% based on the total BTU load. Bear in mind, you will never run across this in the field other than to replace something that is existing. This type of venting is virtually obsolete.

C.2.16 maybe to use the smaller size?

As you have identified, using a single wall vent connector does not fit within the table C.4 values, therefore, you cannot do it. You would need to go to a double wall vent connector for the boiler and use Table C.3 instead. There is rule of thumb (ROT) vent sizing method and a table sizing method. They are two different methods. You will need to know the size of the flue collar of the boiler to use the ROT method. I do have a video series for ROT: ua-cam.com/video/96qwE8EQUsQ/v-deo.html

I strongly suggest starting with this video here: ua-cam.com/video/9Bbumxmuzpo/v-deo.html Go through that series first. Vent stacks are for high rise buildings, you will not find answers to your question with this video

I have pictures of the question & their answers, but cant upload here, but ive spent endless hours trying to calculate

Do not put any stock in the practice test, it is garbage. The best thing you can take of that test is to see how the authors formulate their questions. If memory serves correct, there is one or two high pressure sizing questions on the red seal. They are not overly complicated. If you fail the test based on high pressure sizing, then you have major issues in other areas. Judging by your intelligent questions, I highly doubt that will be the case. I am about to give you the most important advise I can give you: do not sweat the little details and do not over complicate things. Both of those things will lose you marks on your red seal. The red seal is written from a practical stand point, the authors are not trying to trick you with fine details. The test is designed to gauge if you have a reasonable understanding of the code book and a reasonable understanding of practical application. Remember, high pressure gas line sizing is almost always done by an engineer and then put on a blue print. This part of the course is so you can understand how they get top their sizes. You have a clear understanding of that already.

thanks for insights! will follow that ideology, i do intend to write a nasty letter to this online sample testing utility in true Canadian fashion, suggesting a serious audit of the test questions and diagrams they are providing, as they are loaded with spelling and grammar errors, including absurd diagram and calculation errors.

Reducing Tee EL: the gas code gives us no clarification on this other than Clause A.4 which gives the source of the table A.16. The table is from: Sabin Crocker, Piping Handbook 4th Edition (from 1945) The table found in this book further clarifies reducing tees. When a tee is reduce to half its size the EL is also reduced by half. Therefore, in your example, you would just use the table value for a 1" tee, because it is half. (Not exactly, but close enough.) In my example, I bushed down a 2" tee, so I'm still running through a 2" tee and I will use the 2" tee value.

I do not understand your second question here. Please elaborate

thanks, i understand using the smaller of the T outlets as the T size, however i dont understand the logic/ difference between a bushed down T and a reducing T (in the cense of EL) you calculated it as 2" even though it reduced in size. my second question referrers to sizing T's as well, ( basically, is a reducing T sized by its larger opening? or smaller opening? in your example it appears to be sized by direction of flow (which size is entered first) @@MathematicPlumber

so for example, is a 1" tee reduced to 3/4' EL sized as a 1"? or a 3/4"? i feel it would be weird for there not to be a clause addressing this, and weird that I would be the first person to ever ask this question ( as it would be critical to accurate EL fitting calculation

so appears (by your explanation) if a 1" T reduces to 3/4" its EL is a 1" T if a 1' T reduces to 1/2" T ... then its EL is 1/2"